Netdev 2018 day 2

fq_codel may make more noticible packet loss in a can network (cite?), but loss happens in any network system (fifo or fq), and it scares me that more folk are not aware of it, but think buffers are infinite. If your car crashes one turn in 100 with fq_codel 5ms delay, and one in 10000 with a 1000 packet fifo... it's still gonna crash.

One use for ecn is certainly in networks that cannot tolerate loss, I know of one application in a flying spacecraft, (thankfully mostly merely multiplexing sensors across the bus which has a predictable outcome) and I would certainly approve of ecn + *rigorous* congestion awareness in every app in a can (or nmea 20000 network. Certainly I'd support setting an appropriate target delay to supply adaquate buffering.

I'm sorry for the technobabble, I've been at this gig for too long. I did a lot of introductory talks in the beginning....